The global prevalence of headache: an update, with analysis of the influences of methodological factors on prevalence estimates

Table 4 Prevalence (%) of active headache disorder by type, gender and diagnostic certainty (definite or probable)

	Studies specifying both									Studies not making or not specifying the distinction			Definite+probable (where given) or unspecified
	Definite			Probable			All (definite + probable)			Studies not making or not specifying the distinction			Definite+probable (where given) or unspecified
	N	Mean	95% CI	N	Mean	95% CI	N	Mean	95% CI	N	Mean	95% CI	N	Mean	95% CI
Migraine
Both genders	59	10.5	9.0–12.0	59	8.7	7.1–10.3	59	19.2	16.7–21.7	185	12.4	11.2–13.8	244	14.0	12.8–15.2
Males	27	6.2	5.1–8.3	27	6.3	4.7–8.0	27	12.9	10.5–15.3	153	7.9	7.0–8.8	180	8.6	7.8–9.6
Females	28	14.5	11.9–17.2	28	9.7	7.5–12.0	28	24.2	21.2–27.5	156	15.7	14.2–17.4	184	17.0	15.5–18.4
TTH
Both genders	33	19.4	15.3–24.1	33	10.0	7.9–12.6	33	29.4	24.4–34.3	77	24.5	20.7–29.0	110	26.0	22.9–29.6
Males	12	18.1	11.4–25.4	12	8.6	4.6–13.3	12	26.8	20.6–33.5	52	22.6	17.7–28.4	64	23.4	19.1–28.0
Females	12	22.4	13.2–32.9	12	9.4	5.3–14.6	12	31.8	23.6–40.4	54	26.1	21.0–31.7	66	27.1	22.7–32.2

ISSN: 1129-2377